O efeito da granulometria na decrepitação durante a decomposição térmica de calcários e carvão

Detalhes bibliográficos
Autor(a) principal: Crnkovic,Paula Manoel
Data de Publicação: 2004
Outros Autores: Polito,Wagner Luiz, Silva Filho,Claudionor Gomes da, Milioli,Fernando Eduardo, Pagliuso,Josmar Davilson
Tipo de documento: Artigo
Idioma: por
Título da fonte: Química Nova (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422004000100012
Resumo: The use of fluidized bed combustors to burn coal is largely studied to permit the addition of limestone to capture SO2. The particle size for coal and limestone is an important parameter in this process. Thermogravimetry (TG) is used to elucidate the combustion and sulfation processes, but the experimental parameters must be evaluated to be representative in fluidized bed combustors. In the present study the effect of particle size is analyzed in the calcination of limestones and the combustion of coal through the thermogravimetric curve for limestone and derivative thermogravimetric curve for coal. Small peaks representing mass losses between 400 and 500 ºC are observed due to the jumping of particles out of the crucible. This effect, recognized as decrepitation is observed for mid-sized particles provoked by the release of water vapor trapped within their lattice.
id SBQ-3_cdf5ceb4487484e19f4bc6161f091e68
oai_identifier_str oai:scielo:S0100-40422004000100012
network_acronym_str SBQ-3
network_name_str Química Nova (Online)
repository_id_str
spelling O efeito da granulometria na decrepitação durante a decomposição térmica de calcários e carvãolimestonecoaldecrepitationThe use of fluidized bed combustors to burn coal is largely studied to permit the addition of limestone to capture SO2. The particle size for coal and limestone is an important parameter in this process. Thermogravimetry (TG) is used to elucidate the combustion and sulfation processes, but the experimental parameters must be evaluated to be representative in fluidized bed combustors. In the present study the effect of particle size is analyzed in the calcination of limestones and the combustion of coal through the thermogravimetric curve for limestone and derivative thermogravimetric curve for coal. Small peaks representing mass losses between 400 and 500 ºC are observed due to the jumping of particles out of the crucible. This effect, recognized as decrepitation is observed for mid-sized particles provoked by the release of water vapor trapped within their lattice.Sociedade Brasileira de Química2004-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422004000100012Química Nova v.27 n.1 2004reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0100-40422004000100012info:eu-repo/semantics/openAccessCrnkovic,Paula ManoelPolito,Wagner LuizSilva Filho,Claudionor Gomes daMilioli,Fernando EduardoPagliuso,Josmar Davilsonpor2004-03-09T00:00:00Zoai:scielo:S0100-40422004000100012Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2004-03-09T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv O efeito da granulometria na decrepitação durante a decomposição térmica de calcários e carvão
title O efeito da granulometria na decrepitação durante a decomposição térmica de calcários e carvão
spellingShingle O efeito da granulometria na decrepitação durante a decomposição térmica de calcários e carvão
Crnkovic,Paula Manoel
limestone
coal
decrepitation
title_short O efeito da granulometria na decrepitação durante a decomposição térmica de calcários e carvão
title_full O efeito da granulometria na decrepitação durante a decomposição térmica de calcários e carvão
title_fullStr O efeito da granulometria na decrepitação durante a decomposição térmica de calcários e carvão
title_full_unstemmed O efeito da granulometria na decrepitação durante a decomposição térmica de calcários e carvão
title_sort O efeito da granulometria na decrepitação durante a decomposição térmica de calcários e carvão
author Crnkovic,Paula Manoel
author_facet Crnkovic,Paula Manoel
Polito,Wagner Luiz
Silva Filho,Claudionor Gomes da
Milioli,Fernando Eduardo
Pagliuso,Josmar Davilson
author_role author
author2 Polito,Wagner Luiz
Silva Filho,Claudionor Gomes da
Milioli,Fernando Eduardo
Pagliuso,Josmar Davilson
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Crnkovic,Paula Manoel
Polito,Wagner Luiz
Silva Filho,Claudionor Gomes da
Milioli,Fernando Eduardo
Pagliuso,Josmar Davilson
dc.subject.por.fl_str_mv limestone
coal
decrepitation
topic limestone
coal
decrepitation
description The use of fluidized bed combustors to burn coal is largely studied to permit the addition of limestone to capture SO2. The particle size for coal and limestone is an important parameter in this process. Thermogravimetry (TG) is used to elucidate the combustion and sulfation processes, but the experimental parameters must be evaluated to be representative in fluidized bed combustors. In the present study the effect of particle size is analyzed in the calcination of limestones and the combustion of coal through the thermogravimetric curve for limestone and derivative thermogravimetric curve for coal. Small peaks representing mass losses between 400 and 500 ºC are observed due to the jumping of particles out of the crucible. This effect, recognized as decrepitation is observed for mid-sized particles provoked by the release of water vapor trapped within their lattice.
publishDate 2004
dc.date.none.fl_str_mv 2004-02-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422004000100012
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422004000100012
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv 10.1590/S0100-40422004000100012
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv Química Nova v.27 n.1 2004
reponame:Química Nova (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Química Nova (Online)
collection Química Nova (Online)
repository.name.fl_str_mv Química Nova (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv quimicanova@sbq.org.br
_version_ 1750318103510646784

Registros relacionados